Balanced multiple throttle



3 Sheets-Sheet 1 /Eay ATTORNEY.

.March 20, 1928.

R. M. BROWN BALANCED MULTIPLE THROTTLE Filed April 21. 1925 R. M. BRowNBALANCED MULTIPLE THROTTLE March 20, 1928.

3 Sheets-Sheet 2 Filed April 21, 1925 JNVENTOR. Rc) ,/V. @rau/7 BY J'ATTORNEY,

3 Sheets-Sheet 3 @maar INVENTOR.

R. M. BROWN BALANCED MULTIPLE .THROTTLE Filed April 21. 1925 March 20,1928.

Patented Mar. 20, 1928.

,RAY-.n..lnownfor XOMKERS, NEW Yonmnssienon, 'BY MESNE ASSIGNMENTS,i'11o :AMERICAN THRoTmLEcoMrANY,.oENEW Yoann. A coaroaaccionor NEW p l,loan.

BALANCED MULTIPLE THRocrrLE.v

App1icano1ifmea 'aprilv 21, 1925. lseran No. 24,802'. M

4'This invention relates to locomotives equipped with superheaters andvisffor an improvement on the invention disclosedand claimed in myUnited States application for Patent-650,850, 'filed on dulyl111923. Theobject of the-present inventionis `to provide an improved form of thearrangement `which shall` be operable with less effort, `and in whichAsome 'olf-'thestresses vto which the former arrangement snbjeets theapparatusv are eliminated. "f

The' invention yis illustrated in the three sheets of'drawings-herewith,in which Fig. 1 isa sectional yiew-'online 1-'1 ofFig. 2 andrepresentsthe upper vportion 'of the ifro'nt end offalocomotive-equipped with my 1nvention; LAFig. 2 is a section on line2-2-of Fig. 3; Fig B yis -a -seetionon^-line=343 vof Fig. Y1,; Figa A is-a viewo'f thev-valvesjjemployed `,in my invention shown Iin a rcertainposition, the y elements actuating A'the valves being omitted Vin thisfigure for the sakeof cla1ity;`Fig. l5 is v.a section on line r5-"5- ofFig. 41 and Fig.; 6 is a view-corresponding to a `portion of JFig. y2-and illustra-ting ya modification. i b

All of the figures are onthe samelscale. Parts not necessary *for AanunderstandingI of the inventionare broken Vaway and omitted. The -tubesheet lof ythe locomotivefdivides thcsteamand-water-space f'fromy thesmokey Y box 3. Fines extend Vtoward the,v rear .from flue sheet "1 andaccommodatef the tubular superheater'elementsf-d Theends of theselements are"lnzntupward"aty theforward endand seeu'red'to the-header'.This header 'has 'a space "I7, communicating lwith .the-steam space ofthe lboiler bymeansef pipe 'r11 `and connection 12, and fingers orsu'bheaders or fingers 9-19 extending aforwardi from space -7. zOthersubh'eaders, or fingers 10-10 lare intermeshed with'the` subheadersL'9--,9, vbnt fdo fnot communicate-di-` rectly with them. The twofendsof eachelement or unit 5 communicate respectively with'a subhea-derandafsubhea'der'lO. 'At

their forward ends the s'ubheaders*10- -1O open into the superheatedsteam chamber-7. The general arrangement-so far described is wellknownand widely used. A,Its action maybe briefly stated ,as ffollowsc' Steamfrom the boiler flows 'through pipe 11, connection l2, saturated steamAspace 7, intov the subheadersS. From there it flows thru vtheseVeralvsuperheater elements '-5, in whichitfis snperheaied by the`gases'passing through :the "fines 4, and by which it is V"delivered tothe subheaders 10, which leadkit to p thelsuperheatedj steam chamber 7.Q

VIt is not new'to arrange the throttle 'een'- trolling 'the flow ofsteam to thesteam chest of'lthe locomotive ybetween the lsuperheaterheader and the steam chest. 'In theY application referred to vabove alknovel'forin zand arrangement Afor such ,controlling means- :isdefscribed and claimed,` consisting essentially'of a pluralityofrelatively smallgva'lve'sf4 'JIn my'inventionl use this saine ideafofaV pluralityof small valves.- They Varev shown in the drawings at'155-13." These valves ,are seated on valve/seats '14-14 ofthe bushings14"--14n inthe-partition 15, which divides the superheated steam chamberhorizont-ally.

The superheated subheaders 'l0-'10 open 1 into the Aspace L16 abovethepartition- 15.

From fthe space below the partition 15 the usualftwo-steam pipes 17-17extend tothe steam chests. i' y y A ysecondpartition, 18, parallel `to`partition `1:5, divides off the lower portion 19 of v the lspa-celwithin thesiiperheatedl chamber 7;

`'In-this` partition '18 are a numberfoficylindrieal openings 20,' whichare ali'ned with a the bushings 14 and lare slightly 'smaller in area.lThe valves-'13 each comprise fa head 13", a stem 13b, and af-piston13e; Thepistons 13 reciprocate in theopenings 20.

v The-valvestems 13bhave each islet-13",

into` which extends `the pperati-ng vfinger 21. The-'lingers` 2l are allfixed to the shaft-122,

whichextends'through the header, onel end ing-through astuffing box 24to the `outside .of-lthe 'Header and smokebox. -The shaft-22 lyingin abearingY 23,'and the'other extendwhich extends'back to vfthefcab. Alongitu.- y

dinal inovement'o'tl the rod`27 evidently results in a rotary or rockingmotion of the shaft 22, ,so ythat the valves'lcan be'aetuated from thecab. f l 1 1 An inspection of, Figs. land 4 will show that the-slots13d-are not all of the same length. In Fig.4 1, where'thefvalves are allshown in closed position, thefingers'willlbe seen to `bein Aengagementwith the lower end of -each slot, and the lower endsf'allto beonN-'aline In Fig. r2lfthe Avalve'sgare"allnshown' 55 spection, orremoval, openings 32 are made in their open position, the fingers beingomitted for the sake of showing more clearly the difference in thelength of the slots. These fingers at this time engage the upperendsjofthe slots. The valves, it should be noted, are open by differentamounts.

In the form shown theV two outermost valves of the series of sevenvalves are opened to the greatest extent, and are, during the openingrotary motion of shaft 22, the first to open. The distance to which theother valves are open decreases progressively toward the center, and thevalves will open in this order. The order of opening may be made adifferent one, and different valves may be selected to open farther.This phase of the disclosure is old in the above mentioned application,and noclaims to it per se are made herein. i

Some difficulty` has been experienced in practice in connection with themanipulation of the valves. It has been found that even with the valvesmade of fairly small size a considerable effort is required to open thefirst one of them. If they open in pairs the effort is correspondinglygreater, and in any case it may be great enoughV to spring or injure theoperating mechanism. j

To obviate this, I utilize a relativelysmall auxiliary balancing valve28. In the arrangement illustrated this is placed `at one end of theheader, although it may obviously be put in some other osition. Thisvalve is lsimilar to those of e series. It is operatedby a finger onshaft 22, engaging a slot in its stem. The openingit controls howeverdoes not lead to the middle portion of the superheated steam space butinto a passage divided off by vertical partitions V29 andl30 andhorizontalfpartition 31 and opening into the portion 19 at the bottom ofthe :1; ating su erheated steam space. he first motion of theshaft 22opens valve 28. This valve being small no great effort isrequired and nopart of the oper# mechanismV is in danger of being strained beyond theallowable amount.

This movement of` valve 28 'admits steam to chamber 19, whereby theentire series of valves becomes balanced and all of them are readilyopened in turn. The chamber 19 not large,eand the. time consumed beforethe valves become balanced is negligible.

In order to grant ready accessto the valves for purposes of insertion,grinding in, in-

in the top wall of the header, one in line with each valve, whichopenings areV normally closed b covers 33. Thesmokeboxshell is providewith corresponding holes 34, normally closed by covers 35V. Y l

In the variation shown in Fig. 6, the fingers .21l do not engage slots,but to raise the valves engage the projecting extensions extensionscould a 36 on the lower ends of the valves. The difference in the timeand extent of the opening of the valves is brought about by making saidextensions of different lengths, the fingers 21n all bein alinedObviously the Il be made of the same length and the angular setting ofthe `fingers on the shaft varied. In this form, a further means ofguidingthe valves is shown, consisting in the upward extensions 37 ofthe valves, sliding into the recesses 38 of the covers 33a. This formofthe valve actuating means, it will be noted, lacks the feature ofpositively seating the valves when they close. The seating is broughtabout by gravity, aided toward .the end of the `closing movement by thesteam. u

i lVhat `I claim is:

1. In apparatus of the class described, the combination of an elongatedhorizontal chamber for superbe-ated steam; two hori zontal partitionsdividing the chamber into three spaces; means to deliver the steam intothetop chamber and to take it olf from the middle chamber; -a passagefrom the top chamber to thcbottoni chamber; a valve controlling saidpassage and opening toward i the top chamber; a stem on said valve therebeing a row of ports in the upper partition and a corresponding andalined row of openings in the lowerypartition; .valves opening towardthe top space controlling the ports and having stems bearing portionsclosing and `reciprocating in `the' corresponding openings inthe lowerpartition; all of said valve stems being in line; a rotatable `shaftadjacent and. parallel to the row of .valve stems.; means to Vgive `therod a rotary moloo tion;means secured tothe `rod engaging each valvestem` and-adaptedto actuate`ftl1e` valve; said means being arranged to`open the first-namedvalve ahead of all the others.

`2; In apparatus of theclass described, the j combination of anlelongated horizontal chamber for. superheated steam, two hori zontalpartitions dividing the chamber into three spaces; means to deliver thesteam' lll) intothe top chamber land to takey it off from` y the middlechamber; a passage from the top chamber `to the bottom chamber; a valvecontrolling said passage and opcning'toward the top chamber; the upperpartition having a series of ports and the lower partition having acorresponding series of cylindrical openingsalined with the ports;valves opening toward the top space controlling the portsfeach havingconnected to it a piston reciprocating in the g corresponding`cylindrical opening; .and manually operable means to ,actuatc thevalves so ,arranged that the opening movement causes .the firstnamedvalve `to open wahead of all the others.

' RAYMQBROWN;

